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Physics 21 Online
OpenStudy (anonymous):

The charge q4 is now replaced by charge q5 which has the same magnitude, but opposite sign from q4 (i.e., q5 = μC).

OpenStudy (anonymous):

The charge q4 is now replaced by charge q5 which has the same magnitude, but opposite sign from q4 (i.e., q5 = 2.15 μC). What is the new value for the potential energy of the system?

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